Injectable Amorphous Chitin-Agarose Composite Hydrogels for Biomedical Applications

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Polymer Chemistry

Background:

• Injectable hydrogels are crucial for minimally invasive tissue engineering.
• Natural polymers enhance hydrogel biocompatibility.
• Developing novel composite hydrogels is essential for advanced biomedical applications.

Purpose of the Study:

• To develop and characterize a novel injectable Amorphous Chitin (ACh)-Agarose (Agr) composite hydrogel.
• To determine the optimal concentration of ACh and Agr for injectability and stability.
• To evaluate the cytocompatibility of the composite hydrogel for potential biomedical use.

Main Methods:

• Rheological studies (viscoelasticity, yield stress, injectability) were performed on various ACh-Agr concentrations.
• Fourier Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM) characterized the optimized hydrogel.
• In vitro cytocompatibility was assessed using human mesenchymal stem cells (hMSCs).

Main Results:

• An optimal composite gel concentration of 1.5% ACh and 0.25% Agr was identified.
• The optimized gel exhibited favorable elastic modulus (17.3 kPa), yield stress (3.8 kPa), injectability, and physiological temperature stability.
• FT-IR confirmed component presence, SEM revealed good porosity and mesh-like networks, and hMSC studies showed good cell viability.

Conclusions:

• The developed injectable ACh-Agr composite hydrogel possesses suitable properties for tissue engineering.
• The optimized formulation demonstrates excellent injectability, mechanical integrity, and biocompatibility.
• This novel hydrogel holds promise for various biomedical applications, including regenerative medicine.